![](https://cdn.prod.website-files.com/65144f2ab86f0c7800beb8f9/65144f2ab86f0c7800bebb67_white-board-diagram-text-label-page.jpeg)
Purpose
To manipulate the lock dogs on a BKO style top no-go / bottom no-go style lock mandrel to allow dogs to collapse and assembly to be removed from a profile, or tubing collar.
Precautions
Ensure that the probe body does not get worn down to far to prevent lock dogs from retracting properly.
![](https://cdn.prod.website-files.com/65144f2ab86f0c7800beb8f9/65144f2ab86f0c7800bebb6a_1607b533-3506-428f-9e6f-aa6e8dec72c5.png)
![](https://cdn.prod.website-files.com/65144f2ab86f0c7800beb8f9/65247468d3483848bbcef7d8_B%20Probe.jpg)